Abstract
In the present paper, we study the operator ideals generated by the approximation numbers and generalized de La Vall,e Poussin's mean defined in (AimAYek et al. in J. Comput. Anal. Appl. 12(4):768-779, 2010). Our results coincide with those in (Faried and Bakery in J. Inequal. Appl. 2013, doi:10.1186/1029-242X-2013-186) for the generalized Cesaro sequence space.